Lost, created by J.J. Abrams, Damon Lindelof, and Jeffrey Lieber for ABC, is the show that proved broadcast network television could sustain a complex, serialized mythology in the post-Sopranos era. The survivors of Oceanic Flight 815 on a mysterious island generated six seasons of flashbacks, flash-forwards, alternate timelines, smoke monsters, underground hatches, and theological philosophy that made it the most discussed television show of the 2000s. Its controversial finale divided audiences and permanently shaped the conversation about satisfying story conclusions in long-form television. Lost pioneered the online fan community and recap culture that now surrounds every major drama.

Reference:

Wikipedia: Lost

https://en.wikipedia.org/wiki/Lost_(TV_series)